Garrick Gaffney, DO

Shelah Radke, MD, JD, is a double board-certified Child and Adolescent and Adult Psychiatrist with over a decade of extensive experience in mental health care, specializing in the well-being of children, adolescents, and young adults. She currently serves in St. Louis, MO, where she is known for her dynamic leadership as a Medical Director and her robust clinical practice. Throughout her career, Dr. Radke has held pivotal roles, including Medical Director of Crisis Psychiatry Services at Mercy Hospital and key positions in several reputable outpatient clinics across the U.S. Her clinical acumen spans a diverse range of settings, from private practice and crisis care to specialized programs in residential and educational institutions.

A staunch advocate for evidence-based approaches, Dr. Radke integrates lifestyle and pharmacological interventions to foster mental health resilience among her patients. She is particularly passionate about the shared decision-making model, which enhances patient empowerment and satisfaction by actively involving them in their treatment plans. Dr. Radke's academic contributions are equally notable. She has developed educational curriculums that significantly improve health outcomes and has shared her expertise through numerous media appearances and professional talks. Her commitment to medical education is reflected in her mentorship of nurse practitioners and her involvement in creating community psychiatry programs.

Complementing her medical expertise, Dr. Radke holds a Juris Doctorate, with a focus on public health and social policy, which enriches her understanding of the legal and systemic aspects of healthcare. Her approach is deeply holistic, informed by her training in integrative medicine and her personal commitment to wellness, which she practices through nutrition, exercise, and travel with her family. Dr. Radke's professional journey is driven by a commitment to optimizing mental health outcomes and enhancing the quality of life for her patients and their families.

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Dr. Orejarena is board certified by the American Board of Psychiatry and Neurology. She finished her residency from Yale University and the University of Texas Houston. She has done extensive research on psychiatry during her PhD in Neuropsychopharmacology and a Master's in Neuroscience. She is bilingual in Spanish and English. She incorporates different therapy modalities and evidence-based treatments, tailored to each person's needs. She enjoys applying her knowledge in neuroscience and pharmacology into her clinical practice and believes a combination of medication and psychotherapy yields the best treatment outcomes.

Her ultimate goal is to help patients feel their best and accomplish their own goals by developing tools to navigate internal or external obstacles that are part of life. Dr. Orejarena is originally from Colombia, where she earned her medical degree from Universidad Industrial de Santander. She pursued a Master's in Neuroscience at the University of Barcelona and a PhD in Neuropharmacology at the Universidad Pompeu Fabra in Barcelona, Spain. Her PhD thesis was honored summa cum laude.

She completed a postdoctoral fellowship training at the Institut de Neurobiologie de la Mediterranee in Marseille, France. She is the author of multiple peer-reviewed publications and has presented her research at national and international meetings. Over the years, she has worked in a variety of settings including outpatient clinics, acute care, psychiatric hospitals as an Assistant Professor of Psychiatry at the University of Texas Health Sciences Center.‍‍

Dr. Cecilia Fitz-Gerald is a board-certified psychiatrist trained in adult psychiatry and consultation-liaison psychiatry, formerly known as psychosomatic medicine. She has been practicing for over five years and has extensive experience working in a variety of clinical settings, including inpatient, outpatient, and emergency psychiatry. In addition, she specializes in working with patients with acute and chronic medical conditions that may be affecting their mental health, such as cancer, stroke, or a heart condition. She provides patient-centered care utilizing a collaborative approach to help her patients reach their goals. She is a native of Louisiana and a graduate of the LSU School of Medicine in Shreveport. She was elected to the prestigious medical honor society, Alpha Omega Alpha, during her fourth year of medical school and was awarded the John W. Bick Excellence in Psychiatry award. She completed her psychiatry residency training at the University of Texas Southwestern Medical Center where she served as Chief Resident and was a PRITE Fellow. Afterwards, she completed a fellowship in consultation-liaison psychiatry at Yale-New Haven Hospital. Dr. Fitz-Gerald has multiple scholarly publications, particularly in the fields of emergency psychiatry and hospital delirium and has presented at the annual conference for the Academy of Consultation-Liaison Psychiatry. She is passionate about academic medicine and enjoys teaching medical students and residents. Her other areas of clinical interest include ICU delirium and cardiac psychiatry.

Severine Dondina, PMHNP-BC, is a board-certified psychiatric nurse practitioner with licensure in Washington and Florida. She holds a Master of Science in Nursing from the University of Alabama at Birmingham and graduated summa cum laude with dual bachelor’s degrees in nursing and biomedical science. Her background spans outpatient, community, forensic, and crisis psychiatry, including leadership roles with Florida’s Assertive Community Treatment (FACT) and Multi-Disciplinary Forensic Teams.

Currently serving patients in Washington, Severine treats adults with ADHD, anxiety, depression, PTSD, and bipolar disorder. She brings a trauma-informed, strengths-based approach to care and is deeply committed to creating affirming spaces for LGBTQ+ and gender-diverse individuals. Her clinical style combines evidence-based medication management with warm, collaborative support.

Trilingual in English, French, and Spanish, Severine is known for her cultural sensitivity, clinical rigor, and authentic presence. She approaches each patient with curiosity, humility, and respect—believing healing begins with connection.

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Dr. Richard McCall is a board-certified psychiatrist with over 25 years of comprehensive experience in delivering exceptional mental health services across various settings. He received his medical degree from the University of Virginia School of Medicine and completed his Psychiatry residency training at Duke University School of Medicine. He treats adult patients of all ages and is known for a compassionate, patient-centered approach. Dr. McColl integrates psychopharmacology with multiple psychotherapy modalities. He has specialized training in psychodynamic psychotherapy, Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), Acceptance and Commitment Therapy (ACT) and more. He looks forward to helping patients reach their goals for mental health care while providing a compassionate and collaborative environment.

Background and credentials

Dr. Agarwal is a board-certified adult psychiatrist. He obtained his bachelor's degree in Biological Sciences from the University of California at Irvine and graduated cum laude with his medical degree from the American University of Antigua. Dr. Agarwal completed his psychiatry residency training at the University of Central Florida, where he was elected chief resident.

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Treatment approach

Dr. Agarwal employs a collaborative and patient-centered approach, primarily focusing on medication management in combination with supportive therapy. He is a strong advocate of psychoeducation, believing it to be an integral part of effective psychiatric care. Dr. Agarwal specializes in treating adults experiencing depression, anxiety, PTSD, and insomnia. He is also experienced in managing patients with psychiatric conditions complicated by medical comorbidities such as obesity, hypertension, chronic pain, and diabetes.

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What you can expect in a first visit

Patients visiting Dr. Agarwal for the first time can anticipate a comprehensive evaluation conducted in a collaborative and supportive environment. Dr. Agarwal prioritizes understanding each patient's individual needs and concerns, creating a personalized treatment plan that integrates medication, supportive therapy, and psychoeducation. Follow-up visits typically last about 30 minutes, allowing time to adjust treatment and reinforce therapeutic strategies.

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Why Talkiatry?

We’re a virtual mental health practice that makes it easy to find great care. We combine quality and convenience to help you thrive—faster. Our providers, like this one, are highly trained experts who specialize in medication management and collaborate with you on a treatment plan that fits your needs and comfort level.

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